Product Details: Bently Nevada 991-25-50-02-01 is a compact two-wire loop powered Thrust Transmitter with integrated proximitor circuit, designed to work with 3300 NSv proximity probe for non-contact shaft axial thrust displacement monitoring. This Shaft Axial Displacement Transducer converts the gap variation between probe tip and rotating thrust collar into standard 4-20mA analog signal, which can be directly connected to DCS, PLC and other plant control systems without rack-based monitor modules. According to ordering code definition, this model has a full measurement range of ±25 mils, the matched transducer system total length is 5 meters, and it adopts bulkhead screw mounting structure with CSA certification. The transmitter is powered by 12~35V DC loop power supply, equipped with independent zero and span adjustment potentiometers for on-site calibration. It provides auxiliary buffered transducer signal output for signal inspection and troubleshooting. Built-in transducer fault detection function can identify probe open circuit, short circuit and cable connection faults, and output fault current state to trigger system alarm. The potted internal circuit structure can adapt to high humidity and strong vibration industrial environments, and the power-up inhibit function avoids false alarm caused by voltage fluctuation during equipment startup. Widely used in power generation, petrochemical and heavy industrial fields, this Two-Wire Loop Powered Transmitter monitors small centrifugal compressors, fans and pumps, identifies abnormal rotor axial thrust changes at an early stage, prevents thrust bearing damage and catastrophic mechanical failure, and reduces unplanned equipment shutdown.

Core Attributes:

Brand: Bently Nevada

Model: 991-25-50-02-01

Product Type: Integrated Thrust Transmitter

Measurement Range: ±25 mils (±0.6mm)

Matched Probe: 3300 NSv proximity probe

System Cable Length: 5 meters

Power Supply: 12 ~ 35V DC, two-wire loop power

Mount: Bulkhead screw mount

Features: Integrated proximitor circuit, CSA certification, 4-20mA analog output, transducer fault detection, zero and span adjustment